Calibration of fracture models requires a suite of mechanical tests that cover a wide spectrum of loading conditions (the most critical of which are balanced biaxial tension (BBT), plane-strain tension (PST), uniaxial tension (US), and pure shear (SH)). While these tests are well-known, achieving the intended stress-triaxiality that corresponds to each one of these loading cases could be difficult.
In this live webinar, we shed some light on this important topic and present the integration of digital image correlation (DIC) with mechanical testing to support the development and refinement of “fracture testing”. We show how DIC can assist in tracking the evolution of stress-triaxiality in the material, thus enabling the optimization of fracture test sample geometries. On the other hand, we dedicate a significant portion of this webinar to cover the limitations of using DIC in calibrating fracture material cards, highlighting the technical challenges and drawbacks that require significant attention beyond the simple use of DIC as a trusted-tool for reading local strains around the fracture point!